Respect module best practices

[atinux]

Could you check how is define the module starter on https://github.com/nuxt/starter/tree/module ?

Ex: https://github.com/caoxiemeihao/nuxt-electron/blob/07c9971adadec0927c605523ee1b142c2079ffef/package.json#L7-L12 vs https://github.com/nuxt/starter/blob/364444f60e099296051bf49ff292c414ab9dde55/package.json#L7-L13

[caoxiemeihao]

abf84f8 fixed it :)